#include <iostream>
using namespace std;

template<class T>
void mySwap(T& a, T& b)
{
	T temp = a;
	a = b;
	b = temp;

}

void test01()
{
	int a = 10;
	int b = 20;
	mySwap(a, b);
	cout << "a=" << a << endl;
	cout << "b=" << b << endl;
}

int main4()
{
	test01();
	return 0;
}